It might sound silly, but I ran into all kinds of issues trying to install on a fresh Mint XFCE, until I realized it was creating a 32-bit prefix, so I added "WINEPREFIX=~/LaunchBox WINEARCH=win64" into the downloaded script (at the top, so it would be created in 64-bit properly), before realizing the root problem: For some reason apt decided to install the Wine 32-bit instead of Wine 64-bit. This is the first time I've encountered this, and I've tested this with success many times on Mint and Ubuntu (in Virtualbox) and Manjaro (without success) without this architecture issue. I've since added the proper version of Wine.
Now, I am a bit of a noob when it comes to Wine, but would it be beneficial to add that bit to the overall script from the get go, or if both architectures exist does it automatically pick 64-bit in that case (or is my issue just a one in a million fluke)?